Sealing problem of vacuum pump

Due to the particularity of dry gas medium, it is required to seal the vacuum pump to ensure that the dry gas can neither leak out nor leak in. In terms of the current expansion ring sealing form, it is difficult to meet this requirement.

Now, due to the introduction of nitrogen, the nitrogen pressure is always kept at 0.02MPa, while the pressure in the vacuum pump fluctuates between - 0.08 ~ 0.02MPa, such a part of nitrogen

The leakage into the pump is mixed with the medium, which not only consumes nitrogen, but also affects the quality of raw materials. At the same time, the lubricating oil in the oil tank is also sucked into the air cavity with nitrogen, It increases the consumption of lubricating oil, and the oil filling hole needs to be sealed well during the operation of pump, which brings inconvenience to daily maintenance. Therefore, the fundamental method to solve the leakage of seal lies in improving the reliability of seal itself, and the oil filling method also needs to be improved.

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